Update issue templates (#62)

* Update issue templates

* Delete custom.md

* Apply suggestions from code review

Co-Authored-By: dxvladislavvolkov <[email protected]>

* Update bug_report

* Update feature_request.md

* Apply suggestions from code review

Co-Authored-By: dxvladislavvolkov <[email protected]>

Author: dxvladislavvolkov

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Report a bug in devextreme-cli
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!-- *************************************************************************************************
+To reduce the time it takes to process issues, search opened and closed tickets in our support center (https://www.devexpress.com/Support/Center/Question/List/1) before you submit a new issue. The tickets can contain resolutions, workarounds, or information about fixes.
+
+You can also find information that can help you to resolve the issue in the following resources:
+
+    - https://github.com/DevExpress/devextreme-cli/blob/master/README.md
+******************************************************************************************************* -->
+
+# Bug Report
+
+<!-- Please provide the following information -->
+
+**Package version:**
+
+    devextreme-cli version:
+
+**Steps to reproduce:**
+<!-- Provide commands in the sequence you used them. -->
+
+**Current behavior:**
+<!-- Describe how the bug manifests. -->
+
+**Expected behavior:**
+<!-- Describe what you expect to happen. -->
+
+**Screenshots:**
+<!-- Add screenshots that demonstrate your problem if possible. -->

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest a feature for devextreme-cli
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+# Feature request
+
+ **Package versions you currently use:**
+
+     devextreme-cli version:
+
+ **Description:**
+<!-- Describe a problem or missing capability. -->
+
+ **Preferred Solution:**
+<!-- Describe the solution you would like to see. -->
+
+ **Alternatives:**
+<!-- If you have considered any alternative solutions or workarounds, describe them. -->
+
+**Additional Context:**
+<!-- Provide additional information here (i.e. screenshots). -->

.github/ISSUE_TEMPLATE/support-question.md

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+---
+name: Support Question
+about: Questions and requests for support.
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+# Support Question
+
+Please do not submit support requests and "How to" questions here. Navigate to our Support Center (https://devexpress.com/sc) instead.